Stock flow device



Jan. 19, 1932. A. ALDRICH ET AL STQQK FLOW DEVICE Filed Jan. 10, 19s1 2Sheets-Sheet l V a 06. Z. nfl 0 2 a6 Jan. 19, 1932. ALDR|H ET AL1,841,693

STOCK FLOW DEV CE 2 Sheets-Sheet 2 Filed Jan. 10. 1951 oooeecoo a a o o0c Patented Jan. 19, 1932 UN l'T-ED STATES PATENT OFFICE;

ALONZO ALDRICH AND EARL E. BERRY, OF IBELOIT, WISCONSIN, ASSIGNORS 1'0BELOI'I' IRON WORKS, O1 BELOI'I', WISCONSIN, A CORPORATION OF WISCONSINSTOCK FLOW DEVICE Application filed January 10, 1981.

This invention relates to a stock flow device and more particularly to adevice for distributing and evening the flow of stock onto the formingportion of a Fourdrinier paper machine.

It has heretofore been considered necessary to have a rather large flowbox with a plurality of staggered baffles or other devices for effectingan even distribution of the pulp in the stock: with an elimination sofar as possible of eddy currents. The purpose is also to interfere withthe tendency of the fibers to all point in the direction of flow ofstock onto the machine, since this tendency results the formation ofpaper having distinctly less strength in a direction across the machinethan in a direction with the machine, but the use of the usual types offlow boxes, baflles and the like does not satisfactorily accomplish thispurpose.

It is therefore an object of this invention to provide a stock flowdevice that is simple in construction and operation and whicheffectively distributes the stock and evens its flow prior to reachingthe forming wire.

It is a further object of this invention to provide acompact type offlow box with a flow evener of novel construction for effecting theuniform distribution and the even flow of stock onto the machine.

It is a further important object of this invention to provide aplurality of concentric. perforated cylinders that may or may not berelatively rotated through which the stock is introduced and allowed toflow onto the paper machine.

Other and further important objects of this invention will be apparentfrom the disclosures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings andhereinafter more fully described.

On the drawings:

Figure 1 is a front fragmentary elevational view of a head box and flowevener embodying the principles of our invention.

Figure 2 is a longitudinal sectional view of the same.

Serial No. 507,804.

Figure 3 is a sectional view taken substan- Figure 4 is a similarsectional View of a modified form of our invention.

As shown on the drawings:

The reference numeral 1 indicates as a whole a flow box of particularconstruction, in which is mounted a flow evening device indicatedgenerally by the reference numeral 2. The flow box 1 is provided with anarcuate rear shaped wall 3 and side walls l, the rear wall 3 having aforwardly extending plane portion 5 provided with an apron 6. The usualdeckle pulleys 7 are mounted from the outside of the side walls 4 forsupporting deckle straps 8. A forming wire 9 is trained around a breastroll 10 and over the usual table rolls 11 to receive the stock as itflows out over the apron 6 under slices 13 supported from the side walls4 of the flow box. The slices 13 may be of any desired construction andone or more may be employed. As

here illustrated, two slices are shown with adjustable mechanisms 14 forraising or lowering them and the outermost slice is provided with aflexible lip 15.

As shown in Figures 1 to 3 inclusive, the flow evener 2 comprises a pairof concentric perforated cylinders 16 and 17, the outer cylinder 17being stationarily supported from the side walls 4 of the flow box andthe inner perforated cylinder 16 being rotatably mounted therein. Stockis admitted into the interior cylinder 16 from one or both ends thereofby means of a conduit, or conduits 18. At one end ofthe inner cylinder16, there is provided a flanged sleeve 19 to which the cylinder issecured and to which is also secured by means of a spider 20 a drivingshaft 21. $aid driving shaft 21 extends through apacking gland 22 formedabout a suitable opening'in the conduit 18 and carries on its extendedend a pulley or other driving means 23.

Both of the rolls or cylinders 16 and 17 are provided with a pluralityof spaced apertures 24 equally distributed over the effective surfacesof said cylinders and so proportioned with respect to area as to effecta uniform distribution of the stock throughout the width of the flowbox. The inner cylinder 16 may or may not be rotated. Both cylinders areclosely adjacent to but spaced from the rear wall 3 of the flow box andthe rearmost slice 13, with the result that the stock flowing throughthe apertures 24 has but little chance to settle out prior to its flowunder the slices 13 onto the forming wire 9. In passing through theapertures 24, the fibers become uniformly mixed with the water in whichthey are suspended and any knots or bunches of fibers are broken upbefore flowing out into the head box 1. The passage of the stock throughthe pluralit of apertures also results in preventing the fi res fromassuming a common direction and thus results in the formation of astronger sheet in and across the machine direction.

In Figure 4e there is shown a slight modification of our invention,according to the construction of which both the inner and outercylinders can be independently revolved, either together or in oppositedirections. Inner cylinder 16 is open at both ends so that stock is freeto flow thereinto from either conduit 18 placed at opposite endsthereof. The outer cylinder 17 is provided at one end, that opposite thedriving end of the inner cylinder 16, with a driving means,

indicated generally by the reference numeral 25 similar in all respectsto that previously described. The end of the inner cylinder 16 adjacentthe driving mechanism 25 is spaced from the outer cylinder 17 by meansof spacing members or lugs 26. Stock entering through the conduit 18 onthe sameside of the flow box as the driving mechanism 25 enters eitherthe inner cylinder 16 or between the inner and outer cylinders 16 and17, respectively. There is thus a thorough mixing of the fibers and auniform distribution of the stock in its passage through theperiorations of the two cylinders into the flow We are aware that manychanges may be made and numerous details of construction may be variedthrough a wide range without departing from the principles of thisinvention, and we, therefore, do not purpose limiting the patent grantedhereon otherwise than necessitated by the prior art.

We claim as our invention:

1. In a head box for a paper machine, a tubular member extendingtransversely of said head box and having openings for the uniformdistribution of the stock the width of said head box and means forintroducing itock into the interior of said tubular mem- 2. In a headbox for a paper machine, a rotatably mounted perforated roll and meansfor introducing stock into the interior of said roll from an end thereoffor outward flow through the perforations.

3. In a head box for a paper machine, a perforated roll and means forintroducing stock into the interior of said roll from an end thereof foroutward flow through the perforations.

4. In a head box for a paper machine including the slice thereof, arotatably mounted perforated roll ahead of and closely adjacent to theslice and means for introducing stock into the interior of said rollfrom an end thereof for outward flow through the perforations.

5. In a head box for a paper machine, a tubular member extendingtransversely of said head box and having openings for the uniformdistribution of the stock the width of said head box and means forintroducing stock into the interior of said tubular member from bothends thereof.

6. In a Fourdrinier paper machine, a flow box comprising an apron, aslice and a plurality of concentric perforated cylinders through whichstock is introduced into said flow box ahead of the slice.

7 In a Fourdrinier paper machine, a flow box comprising an apron, aslice and a plurality of rotatable concentric perforated cyl-. indersadjacent said slice through which stock is introduced into said flow boxahead of the slice.

8. A flow device for a paper machine com-- prising a head box having anarcuate shaped rear wall, a pair of concentric perforated cylindersadjacent said rear wall and means for introducing stock into theinterior of said cylinders.

9. A flow device for a paper machine comprising a head box, a pair ofconcentric perforated cylinders, means for driving one of said cylindersand means for introducing stock into the interior of said cylinders.

10. A flow device for a paper machine comprising a head box having anarcuate shaped rear wall, a pair of concentric perforated cylindersadjacent said rear wall, means for introducing stock into the interiorof said 0 linders through the ends thereof, and a s ice positionedadjacent to and ahead of said cylinders.

11. A stock flow evener comprising a pair of concentric perforatedcylinders, the inner cylinder having an open end for the admission ofstock;

12. A stock flow evener comprising a pair of concentric perforatedcylinders, the inner cylinder having an open end for the admission ofstock and means for rotating said inner cylinder.

13. A stock flow evener comprising a pair of concentric rotatabl mountedcylinders having open ends for t e admission of stock and perforationsfor the discharge of said stock and means for rotating said cylinders.

14:. A stock flow evener comprising a pair of concentric rotatablymounted cylinders having en ends for the admission of stock and perorations for the discharge of said stock, conduits connected to oppositeopen ends of said cylinders re ctivel and aneans for independentlyrotatmg sai cy ers.

15. A stock flow evener comprising a of concentric rotatably mountedcylin e having 0 en ends for t e admission of stock and per orations forthe discharge of-said stock, conduits connected to opposite open ends ofsaid cylinders respectively and means extending through s ai conduitsforindependently rotating said cylinders.

16. A flow evener comprisin a tubular member having an adit for stoc atan end thereof and an exit so positioned and proportioned as to deliversaid stock uniformly the full efl'ective width thereof.

17. A flow evener comprising a tubular member having an adit for stockat an end thereof and perforations so positioned and proportioned as todeliver said stock uniformly the full eflfective width thereof,

2 means for revolving said tubular member and an outer concentricperforated tubular member.

18. A flow evener comprisin a tubular member having an adit for stoc atan end thereof and perforations so positioned and proportioned as todeliver said stock uni-' formly the full eifective width thereof, meansfor revolving said tubular member, an outer concentric perforatedtubular memher and means for independently rotating said outer tubularmember.

19. A flow device for a Fourdrinier machine comprising a head box havinga concave rear wall, a slice, a plurality of rotat- 40 abl mountedperforated cylinders between sai rear wall and slice and having 0 nin atopposite ends for the admission 0 stoc 20. A flow device for aFourdrinier machine comprising a head box having a concave rear wall, aslice, a plurality of rotat-1 ably mounted perforated cylinders betweensaid rear wall and slice and having openings at opposite ends for theadmission of stock and means for independently rotating said cylinders.

In testimony whereof, we have hereunto subscribed our names at Beloit,Rock County, Wisconsin.

. ALONZO ALDRICH.

EARL E. BERRY.

